sister in the seventh grade had a friend of mine as her science teacher, my mom took my yearbook down, took a picture of his picture, xeroxed it, put it in a frame from senior year and gave it to him in this beautiful frame. it was psonalized and he loved it. but if you have multiple teachers, you don't have to give all those teachers a gift. >> yeah. makes sense. >> if you have an assistant, what factors do you think about when you're talking about a tip? >> well, that really depends on your position in the company and how long that assistant has been with you. now, if it were up to me and i wanted to make sure those calls were screened properly, i would bump that up. >> doormen, do you give to all of the doormen? sometimes you live in a big building there's 10 or 15. >> most of us live in doormen-staffed building. if you don't want to necessarily play favorites, but at the same time, you know, if someone's been helpful or more helpful than others, you might want to give them a gift. also, these buildings have pools. so you could pool together, you know, your money. it's anonymous, t